Make the default theme for new blogs unl_modern.

unl.php

@@ -111,6 +111,13 @@ function unl_disable()
 	exit;
 }
 
+function unl_new_blog($blogId)
+{
+	switch_to_blog($blogId);
+	switch_theme('unl_modern', 'unl_modern');
+	restore_current_blog();
+}
+
 add_action('set_current_user', 'unl_set_current_user', 0);
 add_action('plugins_loaded', 'unl_init');
 add_action('auth_redirect', 'unl_auth_redirect');
@@ -121,3 +128,4 @@ add_action('login_form_register', 'unl_auth_redirect');
 add_action('retrieve_password', 'unl_disable');
 add_action('lost_password', 'unl_disable');
 add_action('password_reset', 'unl_disable');
+add_action('wpmu_new_blog', 'unl_new_blog');